Grinding or sharpening machine.



'No. 729,196 PATENTED MAY 26;1903J A. MATHIEU.

GRINDING 0R SHARPENING MACHINE. APPLICATION rum) MAR. 11, 1903.

N0 MODEL L'n eml qva [feed Mai/lieu 19/ bio litloe'ney,

UNlTED ST T S Patented May 26, 1903.

ALFRED MATHIEU, OF WORCESTER, MASSACHUSETTS.

GRINDING OR SHARPENING MACHINE.

EPECIFIGATION forming part of Letters Patent No. 729,196, dated May 26,1903. Application filed March 11, 1903. Serial No. 147,216. (No model.)

To all whom, it may concern: v

Be itknown that I, ALFRED MATHIEU, a citl zen of the United States,residing at Worcester, in the county of Worcester and State ofl\/1assachusetts,have invented certain new and useful Improvements inGrinding or Sharpening Machines, of which the following is aspecification.

My invention relates to a grinding OFShalpening machine, and moreparticularly to a portable machine for grinding or sharpening barber'sshears and other articles.

The object of my invention is to provide a portable machine for grindingorsharpening barbers shears, &c., of simple construction and having agrindingwheel operated by hand or foot power, as desired, and providedwith means for holding the shears, &c., to be ground in differentpositions relative to the grinding-wheel, said means being adjustable asdesired.

My invention consists in certain novel features of construction of mygrinding or sharpening machine, as will be hereinafter fully described.

Referring to the drawings, Figure 1 is a partial sectional side view ofa grinding-machine embodying my improvements looking in the direction ofarrow at, Fig. 2. The broken lines show a different position of theshears-holding mechanism. Fig. 2 is a plan View of the parts shown byfull lines in Fig. 1 lookingin the direction of arrow 17, same figure. Ablade of shears is shown secured in the holding device. The broken linesshow a different position of the shears. Fig. 3 is on an enlarged scalea detached detail of a portion of the adjustable holding mechanism, andFig. 4 is a detached detail of the shears-holding device or clamp.

In the accompanying drawings, 1 is the top of a table or frame to whichmy portable grinding-machine is secured, in this instance by a metalclamp 2 of ordinary construction, provided with a clamping-screw 2.

3 is the frame or base of my machine, preferably made of cast metal andhaving two Vertical stands 3 3 thereon at one end, the upper ends ofwhich form bearings for the shaft 4, on which is fast the grinding-wheel5, held in this instance between two washers 6 and 7 by a nut 8, turningon a threaded part on the shaft 4. (See Fig. 2.) A grooved pulley 9 isin this instance also fast on the shaft 2 and is adapted to receive abelt 10, (shown by broken lines in Fig. 1,) which extends to afoot-treadle (not shown) and by means of which the shaft 4 andgrindingwheel 5 may be revolved. On the end of the shaft 4 is fast apinion 11, which meshes with and is driven by a gear 12, loose on a studor bolt 13, secured to the upright stand 3. To the gear 12 is securedthe handle 14, by means of which the gear is revolved, and throughpinion 11 the grinding-Wheel 5 is revolved. On the opposite end of theframe 3 from the upright stands 3 3' is an upright post 3", which iscentrally and vertically cored to receive the vertically moving androtating rod 15, which is held in its adjusted position bya set-screw16, turning in a threaded hole in the post 3".

The rod 15 has upon its upper end the forked stand 17, carrying a rod18, on which is loosely mounted to have a rocking and also a slidingmotion the opened end slotted block 19, which in this instance is heldon the rod 18 to move freely thereon by a split pin 20. The block 19 hasan extension 19 thereon, with a hole 19 therein to loosely receive a pin21 on the nut 21, and also a threaded hole 19 to receive a thumb-screw22, by means of which the pin 21 on the nut 21 is secured in position.Extending through the threaded hole 2l"in the nut 21 is the threaded endof an arm 23. Said threaded end is free to turn in oront in the threadedhole 21 in the nut 21. In the outer end of the arm 23 is a verticalopening, which loosely receives the pin 24 on the upper end of theholder or clamp 24.

A set-screw 25 extends in a threaded hole in the end of the arm 23 andholds the stud 24. in its adjusted position. The holder or clamp 24 hasthe movable clamp-plate 24", which is adj ustably secured to thestationary part of the clamp by a thumb-screw 26.

The blade of the shears 27 to be sharpened (shown in Fig. 2) is securedat the lower end of the clamp 24., between the stationary part and themovable plate 24.

The operation of my grinding or sharpening machine will be readilyunderstood by those skilled in the art from the above doscription, inconnection with the drawings, and briefly is as follows: The frame 3 issecured to the top of a table or to some stationary part by the clamp 2.The blade of the shears to be ground is secured in the lower part of theclamp 24. The verticallymoving rod 15 is then raised or lowered androtated according to the desired position of the blade of the shears onthe grinding-wheel and secured in its adjusted position by the set-screw16. The position of the clamp 24 is adjusted by turning the pin 24: inthe end of the holder 23 and securing it by the setscrew 25, and theposition of the holder-arm 23, to bring the blade of the shears on topof the wheel or on one side thereof, is regulated by turning thethreaded portion of said arm through the nut 21. By means of the pin 21on the nut 21 the position of the arm 23 is adjusted as desired. The arm23, carrying the clamp 24 and the shears secured in said clamp, is freeto be raised or lowered by reason of the movable connection of the block19 with the rod 18 and to be moved sidewise to cause the shears-blade totravel back and forth in the direction of the Width of thegrinding-wheel 5. It will thus be seen that by means of my mechanism forholding and moving the blade of the shears any desired position of theblade relative to the grindingsurface of the grinding-wheel may be obtained, and the operator with one hand by means of the arm 14: canrotate the grindingwheel and with the other hand he can control themovement of the shears-blade and the pressure thereof on thegrinding-Wheel. If preferred, the grinding-wheel may be rotated bybelt-power to a treadle or some d riven mechanism instead of by hand.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In a grinding or sharpening machine, the combination with the grindingor sharpening wheel, and means to operate the same, of adjustable meansfor holding the article to be ground or sharpened, consisting of avertically-adjustable rod or support, carrying a horizontal rodsupported thereon, a block loosely mounted on said horizontal rod tomove longitudinally and rock thereon, and a swivel-nut on said block, asupporting-arm threaded at one end to turn in said nut, and anadjustable clamp on its other end to 6X- tend over the grinding-wheel,substantially as shown and described.

ALFRED MATHIEU.

Witnesses:

J. O. DEWEY, M. HAAS.

